Motorola CPCI-6020 Benutzerhandbuch

These asynchronous serial ports (COM1 and COM2) are configured permanently as data 
circuit-terminating equipment (DTE). A terminal for COM1 may be connected to either the 
processor board or the transition module, but not both. 

The two synchronous serial ports, COM3 and COM4, are implemented with the Z85230 ESCC 
on the CPCI-6020. Since the Z85230 does not have all of the necessary modem lines, a Z8536 
CIO is used to provide the missing modem lines. All modem control lines from the ESCC are 
multiplexed/demultiplexed through J3 by the P2MX function due to I/O pin limitations. Refer to 

 for more information. A special Y-adapter cable 

is required for separating the signals from a 50-pin connector on the rear of the transition 
module to two 26-pin connectors for COM3 and COM4. Refer to 

 for cable 

description and part number.

The synchronous serial ports (Serial Ports 3 and 4) are configured through a combination of 
serial interface module (SIM) selection and jumper settings. A SIM is a small “plug-in” printed 
circuit board that converts the TTL-level synchronous or asynchronous port signals to industry 
standard voltage levels used by the ports. The SIM contains the receiver and transmitter circuits 
for converting the input and output signals of the host CPCI-6020 to the appropriate serial data 
communication protocol. The table below lists the SIM connectors and jumper headers 
corresponding to each of the synchronous serial ports. 

Both Serial Port 3 and 4 are routed through connector J1.

The next table provides port and connector assignments for the board and SIMs

Refer to the pin assignment information following this section for connectors J1, J12 and J13, 
as well as other connectors.

EIA-232-D DCE

SIM232DCE6E

EIA-232-D DTE

SIM232DTE6E

Port 3

J1

1

1.  Requires Motorola’s specially designed Y-adapter cable (30-W2046F02A) or similar customer designed adapter.

J12

J17

Port 4

J1

J13

J16